We ordered four of these chair and all four came with back braces that were 18 1/2" long instead of 21 3/4" long....  sent a note to the manufacturer who has agreed to ship the correct braces... I've noticed another review with the same issue.   I've only assembled one chair which took about 25 mins, and that was with the confusion caused by the incorrect braces.. would think the next three will take me less than 15 mins each